Product Summary

The MAX845ESA+ Isolated Transformer Driver provides an isolated power supply small enough to fit in thin PCMCIA cards and space-sensitive applications. MAX845ESA+ drives a low-profile center-tapped transformer primary from a 5V or 3.3V DC power supply. The secondary can be wound to provide any isolated positive or negative voltage at powers up to 750mW. The MAX845ESA+ consists of an oscillator followed by a toggle flip-flop. The flip-flop generates two 50% duty-cycle square waves, which are complementary at half the oscillator frequency (450kHz, min).

Parametrics

MAX845ESA+ absolute maximum ratings: (1)Supply Voltage (VCC): -0.3V to +7V; (2)Control Input Voltage (SD, FS): -0.3V to (VCC + 0.3V); (3)Peak Output Switch Current (D1, D2): 1A; (4)Output Switch Voltage (D1, D2): 12V; (5)Average Output Switch Current (D1, D2): 200mA; (6)Operating Temperature Range: -40℃ to +85℃; (7)Storage Temperature Range: -65℃ to +160℃; (8)Junction Temperature: +150℃; (9)Lead Temperature (soldering, 10sec): +300℃.

Features

MAX845ESA+ features: (1)Transformer Driver for Ultra-Thin 5V-μs Transformers; (2)Isolated DC-to-DC Power Supply for PCMCIA Applications; (3)450kHz Minimum Switching Frequency; (4)Ultra-Low Input Supply Current Ripple; (5)Single +5V or +3.3V Supply; (6)5μW Low-Power Shutdown Mode; (7)8-Pin SO and μMAX Packages; (8)Low Output Ripple Permits Miniature Output Capacitors.

Diagrams

MAX845ESA+ test circuit

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
MAX845ESA+
MAX845ESA+
Maxim Integrated Products
Power Driver ICs Isolated Transformer Driver for PCMCIA
Data Sheet
0-1: $2.77
1-25: $1.85
25-50: $1.35
50-100: $1.33
MAX845ESA+T
MAX845ESA+T
Maxim Integrated Products
Power Driver ICs Isolated Transformer Driver for PCMCIA
Data Sheet
0-1: $2.68
1-25: $1.98
25-50: $1.94
50-100: $1.71